ferguson



No. 519,017. Patented Feb. 7, I899.

J. H. FERGUSON.

BELT SHIFTER.

(Application filed July 15, 1898.)

(No Model.) 2 Sheeis$heet I.

.x I I I m a I WZ7Z6JJ6J a k n f mm'jzizam THE NORRIS PETERS co rnoroumu. wunmsmu u c Patented Feb. 7, I899. J H FERGUSON BE'LT SHIFTER.

(Appl at nfil. d July 15 1898 2 Sheets$het 2.

(N0 Model.)

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UNITED STATES PATENT OFFICE.

JAMES H. FERGUSON, on NEW YORK, N. Y., ASSIGNOR TO THE LovEJoY COMPANY, or SAME PLACE.

BELT-SHIFTER.

SPECIFICATION. forming part of Letters Patent No. 619,017, dated February 7, 1899.

Application filed July 1 5, 18 9 8.

To all whom it may concern:

Be it known that I, JAMES H. FERGUSON, a citizen of the United States, and a resident of New York, in the county of Kings and State of New York, have invented a new and useful Improvement in Belt-Shifters, of which the following is a specification.

The object of my invention is to provide a belt-shifter which is under the control of a tripping mechanism, whereby the main driving-belt of any machine may be shifted from the fast pulley onto the loose pulley at a predetermined time during the operation of the machine.

A practical embodiment of my invention is represented in the accompanying drawings, in which- Figure 1 represents a side view of a leading-machine with my improved belt-shifter applied thereto. Fig. 2 is a front View of the same. Fig. 3 is a horizontal section through 1 the machine, parts of the same being broken away to more clearly show the reciprocating carriage and its operating mechanism. Fig. 4 is an enlarged side view, partially in section, of a portion of the belt-shifter and its operating mechanism; and Fig. 5 is a top plan View of the same.

A designates the casing of a leading-machine, and B represents the main drive-shaft. Fast and loose pulleys b b are mounted on the shaft B and a main driving-belt b leads to a suitable source of power. (Not shown.) Upon this main drive-shaft B are mounted pulleys b b b which pulleys are engaged by belts b 19" b leading to pulleys b b I), mounted on the different shafts of the machine. The pulley is mounted on the brush-operating shaft 17 of the machine. The pulley b is mounted on the blower-operating shaft 19 of the machine, and the pulley b" is mounted on the cross-shaft I), which drives the carriage-reciprocating shaft Z).

The carrier for supporting the molds is denoted by O, which carrier is adapted to travel backward and forward on suitable side rails or tracks cwithin the casing A. This carrier is provided with a traveling switch-nut c, which engages the right and left screwthreaded portion 0 of the shaft b, so that as casing.

Serial No. 686,022. (No model.)

the shaft is rotated the carrier will be reciprocated.

The mechanism which I have shown for shifting the main driving-belt for stopping the rotation of the shaft B, and thereby stop the operation of the machine, is as follows: A belt-shifter rod D is located upon one side of the casing A, exterior thereto, and is connected at its rear end to an angle-lever E, from which a rod 6 leads to a belt-shifting lever e, engaged with the driving-belt b Therod D is provided with a suitable handle d at its forward end and near its forward end is mounted to slide in a suitable bearing 01. A spring c engages one arm of the shifting-lever e and exerts its force in a direction tending to shift the driving-belt b from the fast pulley 1) onto the loose pulley b for stopping the machine when the belt-shifter rod D is released. The rod D is held at the limit of its forward movement by means of a suitable spring-actuated pawl d which is adapted to engage a notch d in the rod D. The pawl d is provided with a tailpiece (1 which is adapted to be engaged by the tripping mechanism for releasing the pawl from the notch d The tripping mechanism above referred to consists of the following parts: A short shaft F is mounted to rock in suitable bearings in the side of the casing A, a portion of the said shaft extending into the interior of the casing and the other portion of the shaft extended exterior thereto. This shaft is provided with an arm f within the casing, which arm extends upwardly to within a short distance of the bottom-of the carrier 0. The said carrier is provided with a rock-dog 0 which is adapted to engage the arm f and rock the shaft F forwardly as the carrier is moved forward, the said dog being so pivoted as to travel freely over the arm as the carrier travels rearwardly. After the arm f has been rocked forwardly and the shaft F thereby rocked the said shaft is returned to its normal position by means of a weighted arm f, which is secured to the shaft exterior to the This weighted arm is connected to an air-cushioning device for preventing the too rapid return of the shaft, which cushioning device consists of a plunger-rod f pivoted to the arm f and having its lower end located within an air-cushion chamber f The arm f is provided with a pawl f which is in position to engage teeth g upon the periphery of a disk G, which is mounted on the shaft F so as to rotate independently there- .of. There are a number of these teeth g, (in the present instance four are shown,) and each forward movement of the carrier 0 causes the said disk G to rotate the distance of one tooth because of the engagement of the pawl f therewith. As the shaft F returns to its normal position the pawl f will slip into the next succeeding tooth g to the rear. The disk G is also provided with a tripping abutment or lug g, which is caused to engage the tailpiece (1 of the pawl d as the disk is rotated, thereby releasing the pawl from the notch d in the rod D, whereby the rod is permitted to slide rearwardly and shift the main driving-belt and stop the machine.

The disk G is provided with a number of depressions 9 upon its periphery opposite the teeth g, which depressions are engaged bya spring-latch g extended outwardly from the casing A, which spring-latch yieldingly holds the disk against movement until positively rotated by the forward rocking movement of the shaft F.

A thumb-piece g projects from the disk G, so that the disk maybe rotated and the pawl f 4 caused to engage a predetermined tooth g, so that the rod D will be released by the first, second, third, or fourth forward movement of the carrier 0. The movementof the shaft F in one direction is limited by means of a set-screw f which enters the bottom of the air-chamber f and engages the bottom of the rod f for limiting its downward movement. This set-screw also accurately adjusts the throw of the pawl f so as to permit it to rotate the disk G the distance of a single tooth each time the shaft F is rocked forwardly.

What I claim is-- 1. In combination,abelt-shifter bar mounted to slide in suitable bearings, a spring-actuated pawl engaging the said bar for holding it at the limit of its upward movement, tripping mechanism for tripping the pawl comprising a rock-shaft, a disk mounted to rotate thereon, having a pawl-and-ratchet engagement with the rock-shaft, the said disk having a projection adapted to release the bar-holding pawl after a predetermined number of rocking movements of the said shaft, substantially as set forth.

2. A belt-shifter bar mounted to slide in suitable bearings, a pawl for holding the bar at the limit of its movement in one direction and means for releasing the said bar comprising a rock-shaft, a weighted lever carried thereby an arm carried by the shaft in position to be engaged for rocking the shaft forwardly, a tripping-disk mounted to rotate on the shaft having a pawl-and-ratchet engagement therewith, the said tripping-disk being in position to release the shifter-bar pawl after a predetermined number of rocking movements of the shaft and a cushioning device engaged with the weighted arm for yieldingly cushioning the return movements -of the rock-shaft, substantially as set forth.

3. A shifter-bar mounted to slide in suitable bearings, a pawl adapted to hold the bar at the limit of its movement in one direction and means for releasing the pawl comprising a rock-shaft, a tripping-disk mounted to rotate on the rock-shaft having a pawl-andratchet engagement with the said shaft, a spring for yieldingly holding the disk against movement except when the shaft is rocked in one direction, the said disk being adapted to engage the shifter-bar pawl to release it after a predetermined number of forward movements of the rock-shaft, substantially as set forth.

In testimony that I claim the foregoing as myinvention I have signed my name, in presence of two witnesses, this 15th day of June, 1898.

JAMES H. FERGUSON.

Witnesses:

FREDK. HAYNES, C. S. SUNDGREN. 

